Sumastri, H., Rahmaninda, D., Vasra, E., & Hendawati, H. (2023). Pengaruh Upright Position terhadap Lama Persalinan Kala 1 Fase Aktif. JPP (Jurnal Kesehatan Poltekkes Palembang), 18(2), 119-124. https://doi.org/10.36086/jpp.v18i2.1797